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          <a href="./ExtUtils::Typemaps.html">ExtUtils::Typemaps</a>
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            (<a href="./ExtUtils::Typemaps.txt">source</a>,
            <a href="https://metacpan.org/pod/ExtUtils::Typemaps">CPAN</a>)
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            <div id="moduleversion">version 3.43</div>
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        <h1><a id="toc">CONTENTS</a></h1>
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              <li>
                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#NAME">NAME</a>
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              <li>
                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#SYNOPSIS">SYNOPSIS</a>
              </li>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#DESCRIPTION">DESCRIPTION</a>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#METHODS">METHODS</a>
                            <ul>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#new">new</a>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#file">file</a>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#add_typemap">add_typemap</a>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#add_inputmap">add_inputmap</a>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#add_outputmap">add_outputmap</a>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#add_string">add_string</a>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#remove_typemap">remove_typemap</a>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#remove_inputmap">remove_inputmap</a>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#remove_inputmap1">remove_inputmap</a>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#get_typemap">get_typemap</a>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#get_inputmap">get_inputmap</a>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#write">write</a>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#as_string">as_string</a>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#as_embedded_typemap">as_embedded_typemap</a>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#merge">merge</a>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#is_empty">is_empty</a>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#list_mapped_ctypes">list_mapped_ctypes</a>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#_get_typemap_hash">_get_typemap_hash</a>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#_get_inputmap_hash">_get_inputmap_hash</a>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#_get_outputmap_hash">_get_outputmap_hash</a>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#_get_prototype_hash">_get_prototype_hash</a>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#clone">clone</a>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#tidy_type">tidy_type</a>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#CAVEATS">CAVEATS</a>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#SEE-ALSO">SEE ALSO</a>
              </li>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#AUTHOR">AUTHOR</a>
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                <a class="text-decoration-none" href="./ExtUtils::Typemaps.html#COPYRIGHT-&amp;-LICENSE">COPYRIGHT &amp; LICENSE</a>
              </li>
          </ul>

      <h1 id="NAME"><a class="permalink" href="./ExtUtils::Typemaps.html#NAME">#</a>NAME</h1>

<p>ExtUtils::Typemaps - Read/Write/Modify Perl/XS typemap files</p>

<h1 id="SYNOPSIS"><a class="permalink" href="./ExtUtils::Typemaps.html#SYNOPSIS">#</a>SYNOPSIS</h1>

<pre><code># read/create file
my $typemap = ExtUtils::Typemaps-&gt;new(file =&gt; &#39;typemap&#39;);
# alternatively create an in-memory typemap
# $typemap = ExtUtils::Typemaps-&gt;new();
# alternatively create an in-memory typemap by parsing a string
# $typemap = ExtUtils::Typemaps-&gt;new(string =&gt; $sometypemap);

# add a mapping
$typemap-&gt;add_typemap(ctype =&gt; &#39;NV&#39;, xstype =&gt; &#39;T_NV&#39;);
$typemap-&gt;add_inputmap(
   xstype =&gt; &#39;T_NV&#39;, code =&gt; &#39;$var = ($type)SvNV($arg);&#39;
);
$typemap-&gt;add_outputmap(
   xstype =&gt; &#39;T_NV&#39;, code =&gt; &#39;sv_setnv($arg, (NV)$var);&#39;
);
$typemap-&gt;add_string(string =&gt; $typemapstring);
                                         # will be parsed and merged

# remove a mapping (same for remove_typemap and remove_outputmap...)
$typemap-&gt;remove_inputmap(xstype =&gt; &#39;SomeType&#39;);

# save a typemap to a file
$typemap-&gt;write(file =&gt; &#39;anotherfile.map&#39;);

# merge the other typemap into this one
$typemap-&gt;merge(typemap =&gt; $another_typemap);</code></pre>

<h1 id="DESCRIPTION"><a class="permalink" href="./ExtUtils::Typemaps.html#DESCRIPTION">#</a>DESCRIPTION</h1>

<p>This module can read, modify, create and write Perl XS typemap files. If you don&#39;t know what a typemap is, please confer the <a href="perlxstut.html">perlxstut</a> and <a href="perlxs.html">perlxs</a> manuals.</p>

<p>The module is not entirely round-trip safe: For example it currently simply strips all comments. The order of entries in the maps is, however, preserved.</p>

<p>We check for duplicate entries in the typemap, but do not check for missing <code>TYPEMAP</code> entries for <code>INPUTMAP</code> or <code>OUTPUTMAP</code> entries since these might be hidden in a different typemap.</p>

<h1 id="METHODS"><a class="permalink" href="./ExtUtils::Typemaps.html#METHODS">#</a>METHODS</h1>

<h2 id="new"><a class="permalink" href="./ExtUtils::Typemaps.html#new">#</a>new</h2>

<p>Returns a new typemap object. Takes an optional <code>file</code> parameter. If set, the given file will be read. If the file doesn&#39;t exist, an empty typemap is returned.</p>

<p>Alternatively, if the <code>string</code> parameter is given, the supplied string will be parsed instead of a file.</p>

<h2 id="file"><a class="permalink" href="./ExtUtils::Typemaps.html#file">#</a>file</h2>

<p>Get/set the file that the typemap is written to when the <code>write</code> method is called.</p>

<h2 id="add_typemap"><a class="permalink" href="./ExtUtils::Typemaps.html#add_typemap">#</a>add_typemap</h2>

<p>Add a <code>TYPEMAP</code> entry to the typemap.</p>

<p>Required named arguments: The <code>ctype</code> (e.g. <code>ctype =&gt; &#39;double&#39;</code>) and the <code>xstype</code> (e.g. <code>xstype =&gt; &#39;T_NV&#39;</code>).</p>

<p>Optional named arguments: <code>replace =&gt; 1</code> forces removal/replacement of existing <code>TYPEMAP</code> entries of the same <code>ctype</code>. <code>skip =&gt; 1</code> triggers a <i>&quot;first come first serve&quot;</i> logic by which new entries that conflict with existing entries are silently ignored.</p>

<p>As an alternative to the named parameters usage, you may pass in an <code>ExtUtils::Typemaps::Type</code> object as first argument, a copy of which will be added to the typemap. In that case, only the <code>replace</code> or <code>skip</code> named parameters may be used after the object. Example:</p>

<pre><code>$map-&gt;add_typemap($type_obj, replace =&gt; 1);</code></pre>

<h2 id="add_inputmap"><a class="permalink" href="./ExtUtils::Typemaps.html#add_inputmap">#</a>add_inputmap</h2>

<p>Add an <code>INPUT</code> entry to the typemap.</p>

<p>Required named arguments: The <code>xstype</code> (e.g. <code>xstype =&gt; &#39;T_NV&#39;</code>) and the <code>code</code> to associate with it for input.</p>

<p>Optional named arguments: <code>replace =&gt; 1</code> forces removal/replacement of existing <code>INPUT</code> entries of the same <code>xstype</code>. <code>skip =&gt; 1</code> triggers a <i>&quot;first come first serve&quot;</i> logic by which new entries that conflict with existing entries are silently ignored.</p>

<p>As an alternative to the named parameters usage, you may pass in an <code>ExtUtils::Typemaps::InputMap</code> object as first argument, a copy of which will be added to the typemap. In that case, only the <code>replace</code> or <code>skip</code> named parameters may be used after the object. Example:</p>

<pre><code>$map-&gt;add_inputmap($type_obj, replace =&gt; 1);</code></pre>

<h2 id="add_outputmap"><a class="permalink" href="./ExtUtils::Typemaps.html#add_outputmap">#</a>add_outputmap</h2>

<p>Add an <code>OUTPUT</code> entry to the typemap. Works exactly the same as <code>add_inputmap</code>.</p>

<h2 id="add_string"><a class="permalink" href="./ExtUtils::Typemaps.html#add_string">#</a>add_string</h2>

<p>Parses a string as a typemap and merge it into the typemap object.</p>

<p>Required named argument: <code>string</code> to specify the string to parse.</p>

<h2 id="remove_typemap"><a class="permalink" href="./ExtUtils::Typemaps.html#remove_typemap">#</a>remove_typemap</h2>

<p>Removes a <code>TYPEMAP</code> entry from the typemap.</p>

<p>Required named argument: <code>ctype</code> to specify the entry to remove from the typemap.</p>

<p>Alternatively, you may pass a single <code>ExtUtils::Typemaps::Type</code> object.</p>

<h2 id="remove_inputmap"><a class="permalink" href="./ExtUtils::Typemaps.html#remove_inputmap">#</a>remove_inputmap</h2>

<p>Removes an <code>INPUT</code> entry from the typemap.</p>

<p>Required named argument: <code>xstype</code> to specify the entry to remove from the typemap.</p>

<p>Alternatively, you may pass a single <code>ExtUtils::Typemaps::InputMap</code> object.</p>

<h2 id="remove_inputmap1"><a class="permalink" href="./ExtUtils::Typemaps.html#remove_inputmap1">#</a>remove_inputmap</h2>

<p>Removes an <code>OUTPUT</code> entry from the typemap.</p>

<p>Required named argument: <code>xstype</code> to specify the entry to remove from the typemap.</p>

<p>Alternatively, you may pass a single <code>ExtUtils::Typemaps::OutputMap</code> object.</p>

<h2 id="get_typemap"><a class="permalink" href="./ExtUtils::Typemaps.html#get_typemap">#</a>get_typemap</h2>

<p>Fetches an entry of the TYPEMAP section of the typemap.</p>

<p>Mandatory named arguments: The <code>ctype</code> of the entry.</p>

<p>Returns the <code>ExtUtils::Typemaps::Type</code> object for the entry if found.</p>

<h2 id="get_inputmap"><a class="permalink" href="./ExtUtils::Typemaps.html#get_inputmap">#</a>get_inputmap</h2>

<p>Fetches an entry of the INPUT section of the typemap.</p>

<p>Mandatory named arguments: The <code>xstype</code> of the entry or the <code>ctype</code> of the typemap that can be used to find the <code>xstype</code>. To wit, the following pieces of code are equivalent:</p>

<pre><code>my $type = $typemap-&gt;get_typemap(ctype =&gt; $ctype)
my $input_map = $typemap-&gt;get_inputmap(xstype =&gt; $type-&gt;xstype);

my $input_map = $typemap-&gt;get_inputmap(ctype =&gt; $ctype);</code></pre>

<p>Returns the <code>ExtUtils::Typemaps::InputMap</code> object for the entry if found.</p>

<h2 id="get_outputmap"><a class="permalink" href="./ExtUtils::Typemaps.html#get_outputmap">#</a>get_outputmap</h2>

<p>Fetches an entry of the OUTPUT section of the typemap.</p>

<p>Mandatory named arguments: The <code>xstype</code> of the entry or the <code>ctype</code> of the typemap that can be used to resolve the <code>xstype</code>. (See above for an example.)</p>

<p>Returns the <code>ExtUtils::Typemaps::InputMap</code> object for the entry if found.</p>

<h2 id="write"><a class="permalink" href="./ExtUtils::Typemaps.html#write">#</a>write</h2>

<p>Write the typemap to a file. Optionally takes a <code>file</code> argument. If given, the typemap will be written to the specified file. If not, the typemap is written to the currently stored file name (see <a href="./ExtUtils::Typemaps.html#file">&quot;file&quot;</a> above, this defaults to the file it was read from if any).</p>

<h2 id="as_string"><a class="permalink" href="./ExtUtils::Typemaps.html#as_string">#</a>as_string</h2>

<p>Generates and returns the string form of the typemap.</p>

<h2 id="as_embedded_typemap"><a class="permalink" href="./ExtUtils::Typemaps.html#as_embedded_typemap">#</a>as_embedded_typemap</h2>

<p>Generates and returns the string form of the typemap with the appropriate prefix around it for verbatim inclusion into an XS file as an embedded typemap. This will return a string like</p>

<pre><code class="plaintext">TYPEMAP: &lt;&lt;END_OF_TYPEMAP
... typemap here (see as_string) ...
END_OF_TYPEMAP</code></pre>

<p>The method takes care not to use a HERE-doc end marker that appears in the typemap string itself.</p>

<h2 id="merge"><a class="permalink" href="./ExtUtils::Typemaps.html#merge">#</a>merge</h2>

<p>Merges a given typemap into the object. Note that a failed merge operation leaves the object in an inconsistent state so clone it if necessary.</p>

<p>Mandatory named arguments: Either <code>typemap =&gt; $another_typemap_obj</code> or <code>file =&gt; $path_to_typemap_file</code> but not both.</p>

<p>Optional arguments: <code>replace =&gt; 1</code> to force replacement of existing typemap entries without warning or <code>skip =&gt; 1</code> to skip entries that exist already in the typemap.</p>

<h2 id="is_empty"><a class="permalink" href="./ExtUtils::Typemaps.html#is_empty">#</a>is_empty</h2>

<p>Returns a bool indicating whether this typemap is entirely empty.</p>

<h2 id="list_mapped_ctypes"><a class="permalink" href="./ExtUtils::Typemaps.html#list_mapped_ctypes">#</a>list_mapped_ctypes</h2>

<p>Returns a list of the C types that are mappable by this typemap object.</p>

<h2 id="_get_typemap_hash"><a class="permalink" href="./ExtUtils::Typemaps.html#_get_typemap_hash">#</a><a id="get_typemap_hash"></a>_get_typemap_hash</h2>

<p>Returns a hash mapping the C types to the XS types:</p>

<pre><code>{
  &#39;char **&#39; =&gt; &#39;T_PACKEDARRAY&#39;,
  &#39;bool_t&#39; =&gt; &#39;T_IV&#39;,
  &#39;AV *&#39; =&gt; &#39;T_AVREF&#39;,
  &#39;InputStream&#39; =&gt; &#39;T_IN&#39;,
  &#39;double&#39; =&gt; &#39;T_DOUBLE&#39;,
  # ...
}</code></pre>

<p>This is documented because it is used by <code>ExtUtils::ParseXS</code>, but it&#39;s not intended for general consumption. May be removed at any time.</p>

<h2 id="_get_inputmap_hash"><a class="permalink" href="./ExtUtils::Typemaps.html#_get_inputmap_hash">#</a><a id="get_inputmap_hash"></a>_get_inputmap_hash</h2>

<p>Returns a hash mapping the XS types (identifiers) to the corresponding INPUT code:</p>

<pre><code>{
  &#39;T_CALLBACK&#39; =&gt; &#39;   $var = make_perl_cb_$type($arg)
&#39;,
  &#39;T_OUT&#39; =&gt; &#39;    $var = IoOFP(sv_2io($arg))
&#39;,
  &#39;T_REF_IV_PTR&#39; =&gt; &#39;   if (sv_isa($arg, \\&quot;${ntype}\\&quot;)) {
  # ...
}</code></pre>

<p>This is documented because it is used by <code>ExtUtils::ParseXS</code>, but it&#39;s not intended for general consumption. May be removed at any time.</p>

<h2 id="_get_outputmap_hash"><a class="permalink" href="./ExtUtils::Typemaps.html#_get_outputmap_hash">#</a><a id="get_outputmap_hash"></a>_get_outputmap_hash</h2>

<p>Returns a hash mapping the XS types (identifiers) to the corresponding OUTPUT code:</p>

<pre><code>{
  &#39;T_CALLBACK&#39; =&gt; &#39;   sv_setpvn($arg, $var.context.value().chp(),
              $var.context.value().size());
&#39;,
  &#39;T_OUT&#39; =&gt; &#39;    {
          GV *gv = (GV *)sv_newmortal();
          gv_init_pvn(gv, gv_stashpvs(&quot;$Package&quot;,1),
                     &quot;__ANONIO__&quot;,10,0);
          if ( do_open(gv, &quot;+&gt;&amp;&quot;, 3, FALSE, 0, 0, $var) )
              sv_setsv(
                $arg,
                sv_bless(newRV((SV*)gv), gv_stashpv(&quot;$Package&quot;,1))
              );
          else
              $arg = &amp;PL_sv_undef;
       }
&#39;,
  # ...
}</code></pre>

<p>This is documented because it is used by <code>ExtUtils::ParseXS</code>, but it&#39;s not intended for general consumption. May be removed at any time.</p>

<h2 id="_get_prototype_hash"><a class="permalink" href="./ExtUtils::Typemaps.html#_get_prototype_hash">#</a><a id="get_prototype_hash"></a>_get_prototype_hash</h2>

<p>Returns a hash mapping the C types of the typemap to their corresponding prototypes.</p>

<pre><code>{
  &#39;char **&#39; =&gt; &#39;$&#39;,
  &#39;bool_t&#39; =&gt; &#39;$&#39;,
  &#39;AV *&#39; =&gt; &#39;$&#39;,
  &#39;InputStream&#39; =&gt; &#39;$&#39;,
  &#39;double&#39; =&gt; &#39;$&#39;,
  # ...
}</code></pre>

<p>This is documented because it is used by <code>ExtUtils::ParseXS</code>, but it&#39;s not intended for general consumption. May be removed at any time.</p>

<h2 id="clone"><a class="permalink" href="./ExtUtils::Typemaps.html#clone">#</a>clone</h2>

<p>Creates and returns a clone of a full typemaps object.</p>

<p>Takes named parameters: If <code>shallow</code> is true, the clone will share the actual individual type/input/outputmap objects, but not share their storage. Use with caution. Without <code>shallow</code>, the clone will be fully independent.</p>

<h2 id="tidy_type"><a class="permalink" href="./ExtUtils::Typemaps.html#tidy_type">#</a>tidy_type</h2>

<p>Function to (heuristically) canonicalize a C type. Works to some degree with C++ types.</p>

<pre><code>$halfway_canonical_type = tidy_type($ctype);</code></pre>

<p>Moved from <code>ExtUtils::ParseXS</code>.</p>

<h1 id="CAVEATS"><a class="permalink" href="./ExtUtils::Typemaps.html#CAVEATS">#</a>CAVEATS</h1>

<p>Inherits some evil code from <code>ExtUtils::ParseXS</code>.</p>

<h1 id="SEE-ALSO"><a class="permalink" href="./ExtUtils::Typemaps.html#SEE-ALSO">#</a><a id="SEE"></a>SEE ALSO</h1>

<p>The parser is heavily inspired from the one in <a href="./ExtUtils::ParseXS.html">ExtUtils::ParseXS</a>.</p>

<p>For details on typemaps: <a href="perlxstut.html">perlxstut</a>, <a href="perlxs.html">perlxs</a>.</p>

<h1 id="AUTHOR"><a class="permalink" href="./ExtUtils::Typemaps.html#AUTHOR">#</a>AUTHOR</h1>

<p>Steffen Mueller <code>&lt;smueller@cpan.org</code>&gt;</p>

<h1 id="COPYRIGHT-&amp;-LICENSE"><a class="permalink" href="./ExtUtils::Typemaps.html#COPYRIGHT-&amp;-LICENSE">#</a><a id="COPYRIGHT"></a><a id="COPYRIGHT-LICENSE"></a>COPYRIGHT &amp; LICENSE</h1>

<p>Copyright 2009, 2010, 2011, 2012, 2013 Steffen Mueller</p>

<p>This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.</p>


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